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Two immobile point charges Q1 and Q2 of values +q and +3q respectively are some distance apart. Q3, with value +2q is placed between them and does not move. What is the ratio of the distance between Q3 and Q2 to the distance between Q1 and Q3?

As Q 3 remains stationary, it is clear that it is not accelerating. Thus we can deduce from Newton's second law that there is no resultant force acting upon the charge. However there are still electrostatic ...
HR
Answered by Hugh R. • Physics tutor
4718 Views

Find the speed of a wave.

To solve that we get given that a wave generator produces three waves per second at a wavelenght of 1.2 meters. To tackle this you can use the formula v= f * lambda (speed = frequency * wavelength) In prepar...
MP
Answered by Max P. • Physics tutor
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For a car with a mass of 1200kg, how long will it take for it to accelerate to 25m/s, starting from rest, with a total driving force of 1,500N?

This can be solved in 2 main sections: the first to find the acceleration of the car, and then the second to find how long it spends accelerating. To find the acceleration, Newton's 2nd Law (F=ma) can be use...
CS
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Newton's Law of Gravitation states: F=GMm/r^2, where G is the gravitational constant (6.67×10−11m^3kg^−1s^−2). Kepler's Third Law, states t^2=kR^3. The mass of the sun is 1.99x10^30kg. Find the value of k and its units

F=GMm/r 2 =mv 2 /r, v=2pir/t equating the two values for F and remembering to include the equation for v, GMm/r^2 = m(2pir/t ^2)^2/r. Rearranging to find t^2, t^2 = 4pi^2r^3/GM where 4pi^2/GM equals the cons...
SB
Answered by Sam B. • Physics tutor
17858 Views

Derive the kinetic theory equation pV=Nm/3(crms2) for an ideal gas.

Assume a point molecule in a container with dimensions l x by l y by l z travelling at velocity c 1 given by c 1 2 =u 1 2 +v 1 2 +w 1 2 ​​​​​​ where u, v, w are the x, y, and z velocity components. >each ...
MV
Answered by Maryna V. • Physics tutor
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